<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="css/bootstrap.min.css">
    <style>
        /* .row div{
            background-color: red;
            border:1px solid blue;
            box-sizing: border-box;
        } */
    </style>
</head>
<body>
    <!-- <span class="glyphicon glyphicon-star" aria-hidden="true"></span>
   <div class="row">
       <div class="col-md-3 col-sm-6 col-xs-12">1</div>
       <div class="col-md-3 col-sm-6 col-xs-12">1</div>
       <div class="col-md-3 col-sm-6 col-xs-12">1</div>
       <div class="col-md-3 col-sm-6 col-xs-12">1</div>
   </div> -->
   <div class="container">
   <div class="row">

    <div class="col-sm-6 col-md-4">
      <div class="thumbnail">
        <img src="img/05.webp" alt="...">
        <div class="caption">
          <h3>Thumbnail label</h3>
          <p>xxxxxxxxxxxxxxxxxxxxxxxx</p>
          <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
        </div>
      </div>
    </div>
    <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img src="img/02.webp" alt="...">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>xxxxxxxxxxxxxxxxxxxxxxxx</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
      </div>
      <div class="col-sm-6 col-md-4">
        <div class="thumbnail">
          <img src="img/03.webp" alt="...">
          <div class="caption">
            <h3>Thumbnail label</h3>
            <p>xxxxxxxxxxxxxxxxxxxxxxxx</p>
            <p><a href="#" class="btn btn-primary" role="button">Button</a> <a href="#" class="btn btn-default" role="button">Button</a></p>
          </div>
        </div>
    </div>
  </div>
</div>
</body>
</html>